Exhibiting device.



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UNITED sTArEs WILLIAM V. D. KELLEY,` OF

PATENT oEEioE.

EXHIBITING DEVICE.

Specification of Letters Patent.

Patent-.ea Jan. 14, isos.

Application filed April 30, 1906I Serial No. 314,392.

To all whom it may concern:

Be it known that I, WILLIAM V. D. KEL- LEY, a citizen of the United States, residing ture4 and character of the pictures or signs,- as hotographs, half-tones, etc., but in genlucent medium, the pictures being so arranged that when the transparency is illuminated by transmitted light, the icture on the back is distinguishable, and tiie picture on the vfront indistinguishable, and lwhen illuminatedby reflected' light, only the picture on the front is visible, as in an ordinary sign or card.v This object I may carry lout in various specific ways, according to'the naera, my invention consists -in forming the respective pictures 'in contrasting sections an 1n disposing the sections so that -when viewed by transmitted light, the front picture will' be obscured and the rear picture v rendered. visible without interference, but when seen b reflected light, the front pic` ture only w' l 'be visible, the rear one being obscured, by'the intervening medium. In

the preferred .form of my invention, I form `such a duplex signor picture exhibiting device by printing or otherwise forming o n one side of the translucent medium a series of parallel lines separated by spaces of equal width, and then print the .rear picture over these lines. The front" picture also consists of lines and spaces, with thelines overlying those of the rear picture so as to be obscured thereby when thatportionof thel rear picture between the lines becomes visible byy transmitted light. In this manner, which can be carried out by various different arran ements, the front picture, which is visiblein reflected light by reason of'itsI own conf trast with the surface, becomes entirely ob- `scured or blotted' out -by the Alines on the other side, in transmitted light, leaving the rear picture visible in contrast with the darker back round reduced by the lines. In ractice, t e widtli) of the lines and spaces wil be determined according to the'use to which the device is to be put. For instance, in post cards, lines and s aces as fine as one hundred to the inch mig t be used, and in large signs with the observer some distance away, considerably coarser lines could be employed without injuring the eiiect.

The accompanying drawing illustrates one manner of carrying out my invention, wherein,

Figure 1 shows the rear picture, Fig. 2 the l front picture, and Fig. 3 a section of a display apparatus embodying my invention.

In Fig. 1 is shown the rear picture having the equidistant contrasting portions, as lines and spaces over which the picture `to be exhibited by transmitted light is printed, being as shown the letter P. The front picture is composed of alternate lines and' spaces,

pression of a substanti ally continuous picture,

incide respectively with those of the rear picture', so that whenthe rear picture is to be viewed, the parts thereof between the lines on the back appear in the spaces of the front picture, whilethe whole of the front picture Is blotted out by the lines on the back. In this manner twoentirely distinct pictures successively exhibited, without involving any interference of one withthe other.

In Fig. 3, 1 represents a box, 2 the transparency, 3 lights for exhibiting the iront picmedium, 6 the rear picture, 7 lights forexhibiting the rear -picture by transmitted light, and 9 an electric switch for operating the lights.

The invention can be carried outin various ways, according to the character of the pictures, and the rear picture may be :Opaque andy appear as a shadow, or it may be colored parency.` The front picture can also .be of rear picture except when lighted from behind, maybe of paper, stippled paint, or

'separated by a translucent medium can be"- and appear as does an ordinarycolored trans-l vsuiiiciently closel together to produce the imv and is so placed that the lines and spaces coture 4' by reflected light, 5 the translucent various kinds, land the translucent se arating `'medium'., whose function is to exc udc vthe other material such that it will transmit light Without permitting reilection of therear picture.

I have devised a method of photographically producing a trans arency which consists in printing the lines or the rear picture on one side of a sheet of translucent material,

` sensitizing both sides, then printing the rear picture from an ordinary negative on the rear side, and printing the front vpicture on the other side from a negative with an interposedscreen having lines corresponding to those on the rear side, but displaced there- Ipicture in the manner as before described.v

from so as to cover the spaces, and thereby enabling the rear lines to blot out the front This forms a cheapand rapid way of carrying out my invention, -but it will be seen that half-tone pictures, colored printsand all kinds o'f reproductions may be exhibited in this manner, and thereby a novel and sim le device produced foradvertising or exhibitlon purposes.l Various arrangements of colors will produce very novel effects, when exhibited in this manner. It Will also be seen that the .pictures may be` on glass with the intervening translucent medium formed by stipthinner the Whole transparency is, ,the better -will be the effects produced, provided reflection from the rear picture be revented by a l,satisfactory medium. Furt ermore, the rear side need have only lines and spacesin case it is desired to rovide a display device in which the front plcture will be invisible in transmitted light.

Having thus described my invention, declare'that what I claim as new and desire to secure by Letters Patent, is,-

1'. An exhibiting device com rising a trans- 'lucent medium having a plura ty of sectional pictures, the respective sections being `alternately arranged, and a screen having opaque sections coinciding with the sections of one jpicture to render it'invisible in transmitted ght, said latter picture being only visible in reflected light, substantially as described.

. 2. An exhibiting device comprising apicture made of alternately arranged contrastling sections on a trans ucent medium, said picture beingvisible in reflected light, andan opaque screen behind said picture havmg sections coincidingwith the sections of said picture whereby to render said picture Jinvlsible in transmitted light, substantially as described. 4

3. An exhibiting-device comprising a picture made of alternately arranged contrasting sections on a translucent medium, said picture being visible in reected light, and an opaque screen behind said picture having sections coinciding with the sections of said picture whereby to render said icture invisible in transmitted light, an a second picture rendered visiblein transmitted light between the opaque'sections of said screen,

substantially as described. I 4. In an exhibiting device, the combination of a plurality of superposed pictures and an intervening translucent medlum, one of the pictures having a'background contrasting therewith in part to render said picture visible by transmitted light, and harmoniz- 6. Anexhibiting device comprising a translucent body With lines and spaces on the rear side, and on the front sidea picture composed of lines and spaces coinciding therewith, wherebythe picture is invisible in t'ed light, substantially as described.

7. An exhibiting device comprising a transn lucent bddy with lines, spaces and a picture on the rear side thereof, 'and on the front side a -picture composed of lines and spaces coinciding with the lines and spaces on` the rear side, substantially as descrlbed.

. 8. An exhibiting device comprising a translucent body with lines and spaces `of e ual Width on the rear side, and on the front si e a picture composed'of lines and spaces coinciding therewith, whereby the picture is invisible in transmitted light, substantially las described. l

9. The combination with a transparency comprising a translucent. body with hnes and spaces on one side, and on the other side a picture com osed of lines and spaces coincidlng therewit of lighting devices on each side of said transparency, the lights on one side rendering the icture visible, and on the other r'side invlsible, substantially as described.

10. The combination with a trans arency comprising a translucent body wit lines, spaces,and a picture on one side, and on the other side a picture of lines and spaces cointransmitn12ol aiding with the lines and spaces on said'irst tWo subscribing Witnesses, this 27th day of mentioned side, of lighting devices on each April 1906.

side of said transparency and alternately operable to render one or the other of said pic- WILLIAM V' KELLEY' 5 tures Visible, substantially as described. Witnesses:

In testimony whereof, I have signed my JULIAN S. WoosTIER,

name to this specification inthe presence of GEO. A. HOFFMAN. 

